How to Update iOS Wirelessly on the iPhone
Before you begin an update:
Back up your data to iCloud or iTunes just in case something goes wrong with the upgrade and the phone needs to be restored. Connect to a Wi-Fi network. The update can be downloaded over a cellular network, but the updates are large (often 1GB or more), may take a long time to download, and use your monthly wireless data. Wi-Fi is easier and faster. Charge the iPhone battery. The download and installation process takes time. If there’s less than 50 percent battery life remaining, charge the battery before the update.
To update iOS:
Tips for iOS Upgrade
The iPhone notifies you when there’s an update even if you don’t check for it. If you see a red 1 icon on the Settings app on your home screen, that means there’s an iOS update available. You may also receive a push notification. If there isn’t enough empty storage space available on the device to install the update, learn how to update iPhone when you don’t have enough room and follow the tips to fix this situation. If something goes wrong with the installation, there are two options to fix it: Recovery Mode or (if things go badly) DFU Mode. Another result of a failed upgrade is a white screen of death. You can may run into error 3194.
